Synthesis of novel heterocycles containing Se-O/Se-N linkages: Role of intramolecular coordination

The contrasting structure and reactivity of the mono ortho-coordinated aryl- and alkyl-selenium derivatives and 2,6-dibsubstituted aryl- and alkyl-selenium derivatives are described. The 2,6-disubstituted diaryl diselenides with Se$\ctdot$O intramole